The urge to tinker is awash. What TT might better mine and why?

I have the same itch. I have an lp12 with Dynavector xv1t cartridge and AudioOrigami arm. I am very pleased with it and have tried other decks at costly expense and have always reverted to a well set up lp12 as it is so much more musical and dynamic than for example direct drive decks. I have a Tom Evans Groove + and from discussion with Tom I am upgrading to a Mastergroove. The point of this is to get as much as I can from my favourite equipment so I have a base level of high satisfaction  to value other options. Different records have different needs so I am interested in switching options.
I have tried a number of other phonos and none comes anywhere near the Tom Evans in my view for a number of reasons. I am running a bespoke high quality hand made switch box to put other turntables in my system for easy AB comparisons. I have heard the suggestions re GL 99 (?) above and was surprisingly impressed for the price ,so I am having a bespoke plinth made for 3 arms with the GL99 with 3 vintage arms and cartridges for fun. Will be ready maybe Jan 19 so that is something to look forward to.
What I am saying is basically max out (my suggestion is look at the phono stage first?) what you now enjoy, or prefer, to obtain a level that you can use as a reference point for any options. I haven't heard your deck so I don't know how far you can take it.

So the majority so far appear to consider not changing my TT but for odd reasons imho.

Not because it is the best already but because I should just not upgrade. Maybe they are right but there would be very little progress or evolvement if we did not make changes along the way. Sure I have already made my fair share of backwards changes but mostly in speakers so far.

Or so far nobody can really give me a good reason or model to upgrade too.

@tatyana69

I will be interested to hear your comments on you Goldring/Lenco 99 when it arrives. Please post you comments. Thanks.

https://www.usaudiomart.com/details/649211194-goldring-g99-heavy-platter-lenco-transcription-deck/

I use two turntables, The Technics 1200G and the venerable VPI Scout with the acrylic platter. They are both great tables. Maybe keep yours and get another one. Sometimes you don’t know what you have until its gone.  The right cartridge make a difference.

I too have the Technics 1200G. Anyone want to buy it at £2,250 + postage? I did intimate that a quality set up LP12 would be much more preferable to your Nottingham. For example, I would certainly not buy a Nottingham over the lp12 as I would need to spend much more  than that to improve on what I have already. I am saving up for a limited edition Avid turntable as I reckon that may be the logical next step up, but it is 4 or 5 times the price of an lp12.
It depends on whether your overall goal is to improve (subjective) or just have a different experience. In my view (and Tom Evans) a good phono is more important than a good cartridge - but just as difficult to choose, well not difficult  for me as I know what I like.